| 摘要 |
<p>A guide unit 25 includes components such as a first guide member 30 fixed to a supporting frame supported by a main body frame, a second guide member 31 fixed to a supporting plate supporting a contact roller, rollers 32a and 32b housed in a space formed by V-shaped grooves 30a and 31a of guide members 30 and 31, and a roller supporter 33 which connects the rollers 32a and 32b with one another. On the outer circumference of a roller 32a1 which is one of the rollers 32a, a plurality of protruding portions 41 are formed along the circumferential directions. Corresponding to these protruding portions, concave portions 42 are formed along the longitudinal directions of the guide members 30 and 31 on surfaces of the V-shaped grooves 30a and 31a at which surfaces the grooves contacts the roller 32a, so that the protruding portions are able to fit in the corresponding protruding portions 41.</p> |
